4 letter words:
guck11,
cork10,
rock10,
ruck10,
gouk9,
grok9,
koru8,
crog7,
vrou7,
cour6,
3 letter words:
gov7,
guv7,
kor7,
ouk7,
rok7,
vug7,
cog6,
vor6,
cor5,
cru5,
cur5,
orc5,
roc5,
ruc5,
gor4,
gur4,
rug4,
our3,
2 letter words:
ko6,
go3,
gu3,
ug3,
or2,
ou2,
ur2,